-WorkGangBarrierSync::WorkGangBarrierSync(uint n_workers, const char* name)
- : _monitor(Mutex::safepoint, name, Monitor::_safepoint_check_never),
- _n_workers(n_workers), _n_completed(0), _should_reset(false), _aborted(false) {
-}

Nothing uses this constructor and it uses the do-not-know-what-it-means safepoint ranked lock.